Car-truck.



W. S. ADAMS.

GAB. TRUCK. APPLIOATION IILBD JAN. '1, 1909.

Patented Dec. 12, 1911.

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WALTER S. ADAMS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE J. Gr. BRILL i 00., OF PHILADELPHIA, PENNSYLVANIA.

CAR-TRUCK.

Specification of Letters Patent.

Application filed January 7, 1909.

Patented Dec. 12, 1911.

Serial No. 4?1,048.

T 0 all whom it may concern:

Be it known that I, WALTER S. ADAMS, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Car- Trucks, of which the following is a specification.

The object of my invention is to provide a truck of the maximum traction type which will be easy-riding, light, durable and economical to manufacture, and efficient in service, and this object is accomplished by my invention, one embodiment of which is described below.

For a more particular description of my invention, reference is to be had to the accompanying drawings forming a part hereof, in which:

Figure 1 is a side elevation of a truck provided with my improvements. Fig. 2 is a plan view of the same, parts being omitted, which omitted parts are identically the same as those shown. Fig. 3 is a sectional view, enlarged, taken on the line 3-3 of Fig. 2, looking in the direction of the arrows. Fig. 4 is a sectional view, enlarged, taken on the line 44 of Fig. 2, looking in the direction of the arrows. Fig. 5 is a sectional view taken on the line 55 of Fig. 4, looking in the direction of the arrows. Fig. 6 is a perspective view of a bearing for one end of a semi-elliptic spring. Fig. 7 is a plan view of a portion of the truck frame and a two-part draft and bearing device; and Fig. 8 is a side elevation, artly in section, on the line 88 of Fig. looking in the direction of the arrows.

Throughout the various views of the drawings, similar reference characters designate similar parts.

My improved truck 1 is of the maximum traction truck type, and may, as to conventional details, be constructed as follows, that is, with large driving wheels 2 and smaller wheels 3 mounted on axles 4 and 5 respectively, which run in axle boxes 6 and 7 respectively, in the conventional manner. The wheels 8 may be either pilot or trailing wheels, depending upon which end of the truck is disposed so as to lead; but one of the special advantages is that it may be efficiently used with the smaller wheels leading on the front truck, in which event they will act as pilot wheels. The axle boxes 6 and 7 are united by side frames, one on each side. Each of these side frames consists of a top chord 9, which is for its greater length horizontal, one end of which is secured to or integral with a yoke 10 for the axle boxes 6. The other end of the top-chord, near the axle boxes 7 is bent slightly downwardly as at 8 to meet pedestal 11 which lies in a lower plane than the pedestal 10. The frame has secured thereto a plate 12 which is riveted or otherwise secured to the crossing 13 which unites one end of the side frame to the corresponding end of the other side frame. The pedestal 10 is also provided with a horizontally extending arm 14 which is united to a corresponding arm on the other frame by means of a crossing 15, on which may be mounted a motor support 16, in the conventional manner. The pedestals 10 and 11 are also united by suitable tie-rods or lower chords 17 in the customary manner, and the axle boxes 6 and 7 are separated from the tops of the pedestals by axle-box springs 18 and 19 respectively. The crossing 13 preferably carries a cam-plate 20 which, together with a suitable springpressed plunger suspended from beneath a car body, forms an endbearing for the small wheel end of the truck. The top-chords 9 are united by means of transoms 21 secured to said chords by bolts 22. All these features above described are shown and described in my co-pending Patent No. 959,040, dated May 24, 1910, with more or less similarity. These features, however, may be suitably modified to meet special requirements.

My special improvements will now be described. The top-chords 9 are provided near each end of their horizontal-portions with suitable laterally curved and recessed bearings 23 in which rest the upper: and curved heads of links 24 which straddle the chords and extend down to a pointnear the tie-bars 17. These links 24 may be splayed outwardly as shown, and are correspondingly bent at their lower ends as shown in Figs. 3 and 4. Their lower ends are bent upwardly to form points 25, which enter corresponding recesses in the under face of lipped bearing blocks 26. The upper faces of the bearing blocks have recesses 26 in which the ends 27 of the upwardly arched and longitudinally disposed semi-elliptic springs 28 are secured, one end in each block. The links 24- are preferably made as shown, that is, with their lower ends supporting the block 26 in a horizontal position, with their side bars immediately adj acent to said block in a vertical position as at 24, and above this the bars are slightly inclined, as shown in Fig. 4.. These links are splayed in the manner shown so as to prevent undue swinging of the bolster and to steady the same.

The semi-elliptic springs 28 are provided with the usual tie-band 29, to which is bolted the ends of a cross-bolster 30 of the conventional form and in the conventional manner between the transoms 21. The ends of the bolster 30 extend under the topchords 9, as shown in Fig. 3, and in order to provide for differential radiation between the respective ends of the truck, it is located eccentrically, that is, nearer the axle of the driving wheels than that of the trailing wheels. The bolster 30 is also provided with a conventional center bearing 31 and with the other usual features, together with side-bearings 32 which are also made and mounted in the usual manner. The transoms 21 are provided with suitable brackets 33 which support the brake rigging.

From the foregoing, the operation of my improved truck will be readily understood. The load is carried principally by the bolster 30 which is mounted nearer the driving than the trailing wheels and in such a position that with the motor weight about threequarters of the weight carried by the truck is placed upon the driving wheels. The re maining quarter of the weight is normally carried by the smaller wheels, except when passing around a curve when the end-bearing before mentioned places additional pressure on the smaller wheels and keep them from jumping the track. The use of the eccentrically placed bolster supported on longitudinal semi-elliptic springs suspended below the top-chord by the swing-links dispenses with the usual heavy and extensive bolster and spring construction. It allows of the imposition of the apportioned weight to be more immediately placed on the drivewheels by permit-ting the bolster to be proportionately moved nearer their axle; and as further result the space between the transoms and axle of the smaller wheels is amplified for the usual plow frame. In addition to providing means for more efficiently equalizing the car-load carried by the truck, its cost of production is materially cheapened by the construction shown. If it is desired to advance the drawing or draft center of the truck to over or nearly over the axle of the driving wheels, this may be done without material change, as shown in Figs. 7 and 8, by removing the centerbearing 31 and substituting in lieu thereof the two-part drawing and bearing device,

and modifying the bolster accordingly. This consists of a wish-bone frame 3% having a base-part 3 1 secured to a bodybolster 35 of a car body, its forward end being provided with an upwardly extending hollow lug 34t The lower part consists of a counterpart wish-bone frame 36 having at one end a pendant flange 36 secured to the side of the bolster 30 in any desired manner, as by bolts 37, and at its forward end a cylindrical lug 38 fitting into the lug 3%. The transom 21 below this frame is bent outwardly as at 21*, to permit the lower member to clear it when the springs 28 settle and during the drawingof the car. Below the plate 3% and secured to it is a suitable angular-faced rub-plate 39 which has a bearing on suitable anti-friction cones -10 carried in a suitable cup 41 resting on the bolster 30, both the plate 39 and cones 40 being disposed on an arc of a circle of which the center of the lugs 34* and 38 is the center.

lVhile 1 have shown and described 'one embodiment of my invention, it is obvious that it is not restricted thereto, but is broad enough to cover all structures that come within the scope of the annexed claims.

What I claim is: 1

1. In a car truck, the'combination of a frame and large driving and smaller wheels, an eccentrically located transversely disposed bolster, a truck frame having a topchord, transversely outwardly splayed swinging links supported in pairs from the top-chord, blocks at the lower ends of said links and semi-elliptic springs upwardly arched longitudinally disposed below the top-chord and resting at their ends on the lower 'ends of the links, the ends of the bolster resting on the arch of the springs and secured thereto.

2. In a car truck, the combination of a truck frame having a top-chord, large driving wheels at one end and smaller wheelsat the other, a cross-bolster located nearer the driving wheels than the smaller wheels, transversely outwardly splayed swinging links hung from the top-chord adjacent to the axle boxes for the driving wheels, blocks at the lower ends of said links other links likewise supported from the chord, and longitudinally disposed upwardly arched semielliptic springs resting at their ends on the links, the bolster ends being secured to the arch of said springs.

3. In a truck, top chords and means for supporting the same, links suspended from said chords, a block normally supported in a horizontal position at the lower ends of each of said links, a recess in the top of each of said blocks, an upwardly arched semi-elliptic spring-bearing in each pair of said blocks, and a bolster connecting said springs.

4. In a truck, a top-chord and means for supporting the same, bearings on said chord, outwardly splayed links suspended from said bearings, a block at the bottom of each of said links supported in a horizontal position and an upwardly arched semi-elliptic spring having its ends supported by said blocks.

5. In a truck, a top-chord and means for supporting the same, bearings on said chord, links suspended from said bearings, a block at the bottom of each of said links supported in a horizontal position and an upwardly arched semi-elliptic spring having its ends supported by said blocks.

6. In a truck, top-chords, a block normally supported in a horizontal position at the lower ends of each of said links, and a recess in the. top of each of said blocks, an upwardly arched semi-elliptic spring-bearing in each pair of said blocks and a bolster connecting said springs and extending under said chords.

7. In a truck, a top-chord, means for supporting the same, outwardly splayed suspending means, a block supported at the lower ends of said suspending means, upwardly arched springs having bearings on said block, and a bolster connecting said springs.

8. In a truck, a top-chord, means for supporting the same, outwardly splayed suspending means, a block supported at the lower ends of said chord and normally in a horizontal position, and an upwardly arched semi-elliptical spring supported by said block.

9. In a truck, a top-chord, splayed suspending means having hearings on said top chord, blocks suspended therefrom and normally supported in a horizontal position, said blocks having recesses in their upper faces, an upwardly arched semi-elliptical spring having a bearing in said blocks, and a bolster connecting said springs.

10. In a truck, a top chord, lipped blocks suspended therefrom and normally supported in a horizontal position, said blocks having recesses in their upper faces, an up- Wardly arched semi-elliptical spring having its ends engaged in said recesses, and a bolster connecting said springs, said suspending means having spaced portions between which said blocks are received, said suspending means also having portions engaged in the under faces of the blocks.

Signed at Philadelphia, Pa, this 31st day of December, 1908.

WALTER S. ADAMS.

Witnesses:

WM. M. LLOYD, Jr., TERRENOE MoCUsKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

